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In a bigger or more intense form than normal. Likened to a person taking steroids (performance-enhancing drugs) to abnormally increase their strength, stamina, etc. Yikes, did you hear that? It sounded like a car engine on steroids.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
If you describe something as being on steroids, you mean it is an extreme example of that thing. He described the firm as an IT services company on steroids. The new instrument is described as a traditional electric guitar on steroids. Note: Steroids are drugs that some athletes take, often illegally, in order to give them more energy and improve their performance.
Collins COBUILD Idioms Dictionary, 3rd ed. © HarperCollins Publishers 2012
In a very large, enhanced, or exaggerated form: "a weapon one observer had called an M16 on steroids" (Stephen Coonts).
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.